Product details:

Small Block Ford PowerPak Flat Top Piston Kit Forged 4032 High Silicone Low Expansion Aluminum Alloy Bore: 4.030 Stroke: 3.400 Rod: 5.400 Style: Flat 2 reliefs Compression Distance: 1.090 Head Volume: -6.6cc Pin: 0.927 Plasma Moly File to fit Rings 1.5, 1.5, 3.0mmFeatures: Forged Aluminum Pistons CNC machined crown Hand deburred finishing Forced pin oiling with machined drain backs Lightweight slipper skirt forgings CNC finished pin bores Forced Pin Oiling Race Proven, reliable round wire locks, standard with every kit Pre-fitted German steel pins noted for their high strength, light weight and durability Phosphate coating - provides the grey appearance to the Mahle piston. This dry lubricant coating (not to be confused with a thermal film coating) provides a lubricant film in the pin bores and ring grooves until the oil system of the engine reached operating pressure; particularly useful during the initial start-up or break-in of engines to protect against galling and micro welding.